ClassRedefiner.redefineClasses(OpenJPAConfiguration conf,
Map<Class<?>,byte[]> classes)
For each element in classes, this method will redefine
all the element's methods such that field accesses are intercepted
in-line.

ValidationUtils.setupValidation(OpenJPAConfiguration conf)
Setup Validation support by determining if the javax.validation APIs
are available and then create a Validator if required by the
provided configuration.